Editor's Note: This story was updated at 5 p.m. Nov. 9 with additional information.
On Monday, attendance was at 86% for Frankfort Independent Schools, and on Tuesday it fell to 79.86%.
That's when the decision was made for FIS schools to be closed for the rest of the week
The district is using three NTI (Non-Traditional Instruction) days during this time, and schools will reopen on Monday.
FIS Superintendent Sheri Satterly said attendance is normally 95%.
The illness causing the drop in attendance is affecting more than students, with 16 certified teachers out Tuesday.
"Yesterday that was pretty low," Satterly said of the absentee rate. "We had 14 teachers out Monday and we didn't have 14 subs. Everybody from the central office went to Second Street and chipped in, working lunch room duty and monitering halls.
"It was all hands on deck, but that pulls people from the jobs they were hired to do, the jobs they need to do."
While the schools are closed, the custodial staff will be doing a deep clean at both facilities.
Athletics and wraparound childcare are operating as normal for the rest of the week.
"We haven't had the same amount of absences with students or staff in our childcare," Satterly said, "but if we need to close it we would."